Scarifier.



F. A. BROWNE.

SCARlFI'ER.

APPLICATION HLED APR. 3. 1 912.

1,243,672. Patented Opt. 15, 1917.

Z SHEETS-SHEET I.

r FIG I 9 d Li torm/ z FRANK A. BROWNE, 0F BUFFALO, NEW YORK, ASSIGNOR TO THE BARBER ASPHALT BATTING GOMFANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF WEST VIRGINIA.

SCARIFIER.

eas es.-

Specification of Letters Patent. Patented (D617. 16, 1917..

Application filed April 3, 1917. Serial No. 159,406.

To all whom it may concern:

Be it known that I, FRANK A. BROWNE, of Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Scarifiers, whereof the following is a specification, reference being had to the accompanying drawings.

the ground, the power of its thrust is in-' creased in proportion with the amount which it'descends. l p I A still furtherobj'ect is to provide means for regulating the extent of the downward thrust of the abrasive member.

The invention consists enerally of a toothed member pivoted to t e rear portion of a roadrolle'r. The toothedmernber is connected through: intermediate means with a reciprocating piston in such a manner that when, pressure is applied to the piston the toothed member 1S, lowered and force into the ground 'or surface to be broken up.

The raising of the toothed member,,,how-

ever, is 'not accomplished by the action of the piston", but by a coiled spring which is at one, end attached to gomeportion of the machine'and at the other end directly attached to'the toothed member, sothat when pressure is withdrawo from the piston, the toothed member is raised out of engagement with the ground.

Referring to the accompanying drawings, Figure I, is a longitudinal section through a portion of a vehicle conveniently"illustrating the application of my improved scarifier thereto Fig. II, is a similar view showing the device in active position.

Fig. III, is a transverse sectional elevation as viewed in the direction of the arrows III III, in Fig, II. b

My scarifying device isadapted to be em ployed in connection with any road roller of ordinary construction, and applied to the rear portion of the frame. In the drawings I have, therefore, shown the rear ground wheel 1, of a roller having a frame 2. To this is attached the toothed member, which comprises transverse bar ,6, rigidly held between drag bars 5, and mounted in'the rear of wheel 1. Drag bars 5., are in turn pivotally connected to frame 2, through plates 3, rigidly attached to the frame byv rivets,

bolts or other suitable means. Bar 6, is provided with spokes or teeth 7, ad ustably mounted, and held in place by set screw 9, which engages suitable notches 8, therein.

With thispivotal construction the toothed member may be raised, asshown in Fig. I, or lowered. as shown in Fig. 11. In order toaccomplish the, raising of the toothed member 1 provide coiled spring 13, one end of which engages eyelets 16, in plates-17, which are integrallyformed with the bar 6,

and the other end of which is rigidlyse-I cured to the plate 15, attached to the frame 2. The spring 13, tends to raise the bar 6,- to the position shown in Fig. II,"and is suflioiently strong to hold bar 6, 'in' this position. It is not, however, strong enough to counteract or materially afi'ectthe 10wering' means presently to be". described.

In order that bar 6, may be lowered and inder 20, 'connected by pipe 21, with any suitable source of fluid power, and attached to the frame 2, or. other'convenien't portion reciprocate in cylinder20, and has rod 23, formed integrally therewith, which carries on its end roller '25, pivoted thereto'by pin Roller 25, is formed with a spherically cdrved bearing surface adapted to engage guides 26, as best shown in Fig. III. old-pd 23, is connected to bar 6,-by links 32, also pivoted atone end on pin 33, and'ppivoted' held in its lowered position, I provide cylof the road roller. Piston 22, is'adapted to at the other end on pin 34, in cars 35, on-v the p'late--17, which is integrallyv formed with bar 6. With-this construction bar 6,

may be lowered by reciprocation of the pis ton 22, from'left to right as viewed in Figs, IL andIIIL When the par 6, is raised piston 22, occupies the positron shown in Fi .,I,. at the forward-end of cylinder 20. When,

however, pressure is applied to the piston o '35 22, it moves tothe otherend'. of the cylinder.

I 20, moving roller 25, with it and depressing is, therefore, onl 0 bar (3, through the action of link 32.

With this construction the resultant power of the downward thrust applied to the bar 6, is increased through the leverage obtained in links 32. The rate of increase in the leverage, however, the rate at which bar 6, descends, so that the amount of power exerted by the downward thrust is constantly increasing as the bar descends, the greatest thrust being obtained at the polnt of lowest descent. In this way most force is obtained at the point at which it is most nceded, and maximum penetration results.

The extent of reciprotaition of piston 22, and rod 23, is regulated by adj ustable. screw 29, mounted in plate 27, and held in place by nuts 28. Inasmuch as the extent of downward thrust of the bar (3, is primarily i dependent on the extent of horizontal re ciprocation'of the piston 22, the penetration of teeth 7, niay be regulated by limiting the extent of this reciprocation by means of screw 2!).

The extent of actual penetration of teeth 7, may also limited by the setting of teeth through set screw '9. as has already been pointed out. This adjustment is further facilitated by shoe 10 mounted on drag bar 5, and capable of adjustment through slots 11. and bolts 12. Shoe 10, engages the surface to be acted upon as shown in Fig. 11, and thereby definitely limits the extent of penetration of teeth 7. By means of these agencies a very accurate and nice adjustment may be obtained, and one which in no way" affects the means tln'ough which the power is applied to bar 6.

Bar (3, remains ,in its lowered position as shown in Fig. 111, as long as pressure is applied to piston 22, in cylinder 20, but when this pressure is removed, the action Q of spring 13, immediately raises bar (3, to its upper position, and folccspiston 22, back to the forward end of cylinder 20. The parts then remain in this position 'pressureis again applied to piston 22. It

y necessary to apply pressure while. the machine is actually in operation. In this way it will have provided a very simple yet powerful and ellicient means for raising and lowering is more rapid than raised position a until A be seen that I neath the rear of said road engine; a drag bar rigidly connected to said toothed bar and pivotally connectedto said road engine; a spring directly connected to said toothed member tending to hold it in raised inoperative position; a cylinder mounted on said road engine; a "piston reciprocating therein; a link directly pivoted to said piston and said toothed menlber. whereby when pressure is applied to said piston. said toothed member is moved to its lower operative position and there held against the action of the spring, the relation between said link and said piston being such that the downward pressure exerted by said toothed men1- ber increases as said toothed member descends.

2. The combination with a road engine, of a scarifying attachn'ient tlnrrefor, comprising a toothed member suspended beneath the rear of said read engine; a drag bar pivotally connected to said road engine and rigidly connected to said toothed member; a spring directly connected to said toothed member normally tending to hold it in a raised position; a cylinder mounted on said road engine; a piston reciprocating there in; a rod attached to said piston and reciprocating therewith; guides rigidly attached to said road engine; a roller pivotally mounted on the end of said rod moving in said guides; a link also pivoted at one end. to said rod and at the other end to said toothed member,-whereby the toothed member is'lowered in accordance with the reciprocation of said piston.

The combination with a road engine, of

ally connected to said road engine'and rigidly connected to said toothed-inember; a

spring directly connected to saidtoothed member normally tending to hold it in a cylindermounted on said road engine; a piston reciprocating therein; a rod attached to said piston and reciprocating therewith; guides rigidly attached to said road engine; a roller pivotally monnted on the end of said rod moving in said guides; a link also pivoted at one end to said rodand at the other end to said drag bar,

whereby the toothed memberis lowered in accordance with the reciprocation ofsaid piston; vmeans for regulating the extent of reciprocation of said piston.

4. The combination with a road engine, of a scarifying attachment therefor, comprising a toothed member suspended beneath the rear of said engi e; a drag bar pivotally connected to said road .engine and rigidly connected to said toothed member; a spring directly connected to said toothed member normally tending to hold it in a raised position; a cylinder mounted on said road engine; a piston reciprocating therein; a rod attached to said piston and reciprocating therewith; guides rigidly attached to said road engine; a roller pivotally mounted on the end of said rod moving in said guides; a link also pivoted at one end to said rod and at the other end to said drag bar, whereby the toothed member is lowered in accordance with the reciproca- 10 tion of said piston, means for regulating the extent of reciprocation of said piston,

said means comprising a plate mounted on the end of said guides, and a screw adjustably mounted therein, adapted to engage said roller.

In testimony whereof I have hereunto signed my name, at Buffalo, Erie (10., New York, this 29th day of March, 1917.

FRANK A. BROWNE. Witnesses:

HENRY A. SHELDON, MARK F. BROWN. 

